Someone over on e90post bought a stage 2+ non-SAC and it seems his disk was labelled the wrong way round. His installer put it in the opposite way to how it was marked and he wanted to check if that was ok:

That disc is labeled correctly for use with a single-mass flywheel. There doesn't appear to be any issue at all. That being said, he is good to go!

As for gear-noise (a.k.a. clatter), it really isn't that bad at all on this car. We have a 335is here and I have never thought of the noise produced relative to the elimination of the DMF as being excessive. You can have a bit of rattle at idle with the clutch pedal released but this is not evidence of any issue. Nor is resonance under load.